# NTSB investigations: Lycoming VO-435 series NTSB aviation accident and incident investigations since 1962: the probable cause, findings, aircraft, crew, weather and docket of each, linked to the FAA registry and the FAA’s own reports. Page 5 of 13 · 629 cases ## Cases, newest first - [NTSB ATL87LA222](https://openairdocs.org/ntsb/ATL87LA222.md): Bell 47G-2 · Huntsville, AL · Accident · Minor injuries · Limited investigation · Final report · Jul 23, 1987 · N972B · Substantial damage > The helicopter impacted the water during a low-altitude turn over a river. The plt made a low pass to the south over an island at about 30 ft AGL, to show the island to the policewoman/traffic observer onboard. As he was making a climbing right turn at about… - [NTSB LAX87DVM03](https://openairdocs.org/ntsb/LAX87DVM03.md): Bell 47G-5 · Salinas, CA · Accident · No injuries · Final report · Jun 28, 1987 · N6288N · Substantial damage > At the end of an aerial application operation, enroute to the airport, the engine quit. The pilot autorotated the helicopter onto a soft field, where on touchdown, the helicopter was substantially damaged. Inspection of the helicopter revealed that the fuel… - [NTSB CHI87DEV02](https://openairdocs.org/ntsb/CHI87DEV02.md): Bell 47G2 · Peoria Heights, IL · Accident · No injuries · Final report · Jun 22, 1987 · N15395 · Substantial damage > Returning from a powerline patrol flight, the engine surged twice and quit. The pilot executed an autorotation to the only available landing site, a high school football field. On touchdown the blades flexed and severed the tailboom. Investigation revealed… - [NTSB MIA87LA145](https://openairdocs.org/ntsb/MIA87LA145.md): Bell 47G-2 · Rolling Fork, MS · Accident · No injuries · Limited investigation · Final report · Apr 25, 1987 · N202CH · Substantial damage > While landing downwind, at an alt of aprx 20 feet, the helicopter began to settle with power. The pilot then attempted to stop the descent, however, because of insufficient alt & airspeed, was unable. The helicopter then landed hard, rolled over, after which,… - [NTSB ANC87FA043](https://openairdocs.org/ntsb/ANC87FA043.md): Bell 47G-2 · Anchorage, AK · Accident · No injuries · Field investigation · Final report · Mar 7, 1987 · N6140C · Substantial damage > A flight instructor and his commercial rotorcraft student were practicing quick stops to a hover at low altitude over a snow covered non-maintained airstrip. The student, a commercially rated fixed wing pilot, had successfully completed three quick stops, but… - [NTSB NYC87FA039](https://openairdocs.org/ntsb/NYC87FA039.md): Bell 47-G2A · Jamesburg, NJ · Accident · Serious injuries · Field investigation · Final report · Nov 28, 1986 · N7579 · Destroyed > The CFI and private student were practicing lifting off to a hover. The CFI allowed the student to preform one or two under supervision and they were satisfactory. The CFI then allosed the student to start preforming the manuevers. The CFI heard the right… - [NTSB MIA86LA228](https://openairdocs.org/ntsb/MIA86LA228.md): Continental Copters Tomcat MK5A · Indiantown, FL · Accident · Minor injuries · Limited investigation · Final report · Aug 5, 1986 · N9086T · Substantial damage > The aerial application helicopter crashed just after lift-off after sustaining a power failure, the plt stated that he thought the reason for the failure could have been fuel starvation since he had observed some foreign matter in the fuel when he drained the… - [NTSB SEA86LA177](https://openairdocs.org/ntsb/SEA86LA177.md): Bell 47G3B2 · Nahcotta, WA · Accident · Minor injuries · Limited investigation · Final report · Jul 21, 1986 · N7092J · Destroyed > While spraying oyster beds the pilot inadvertently flew the helicopter into the ground. - [NTSB NYC86LA191](https://openairdocs.org/ntsb/NYC86LA191.md): Bell 47G-5A · Portland, CT · Accident · No injuries · Limited investigation · Final report · Jul 20, 1986 · N59400 · Substantial damage > While climbing, shortly after takeoff, the eng quit for undetermined reasons. The pilot autorotated into a sand bank where the helicopter received substantial damage. - [NTSB SEA86LA168](https://openairdocs.org/ntsb/SEA86LA168.md): Bell 47G2A · Chehalis, WA · Accident · No injuries · Limited investigation · Final report · Jul 13, 1986 · N12848 · Substantial damage > During an aerial applications maneuver, a complete loss of power occurred. The power loss was caused by failure of the connecting rod bolt. The acft was too low for autorotation and the aircraft struck the ground tail low. The main rotor blade then struck the… - [NTSB NYC86FNC05](https://openairdocs.org/ntsb/NYC86FNC05.md): Bell 47G-5 · Walthamer, ME · Accident · Minor injuries · Final report · Jul 12, 1986 · N7861S · Substantial damage > While on a spray run the pilot of the Bell 47 was blinded by the sun as he was turning. The aircraft struck power lines, control was lost and the helicopter crashed. - [NTSB CHI86FER11](https://openairdocs.org/ntsb/CHI86FER11.md): Bell 47G-5 · Brooten, MN · Accident · Serious injuries · Final report · Jun 17, 1986 · N8122J · Destroyed > According to the pilot, the helicopter collective control failed to respond to a climb input to level off after a descent for an agricultural swath run. Fire and impact damage to the helicopter was extensive, however one broken rod end in the collective… - [NTSB SEA86LA143](https://openairdocs.org/ntsb/SEA86LA143.md): Bell 47G-2 · Zillah, WA · Accident · No injuries · Limited investigation · Final report · Jun 12, 1986 · N11VH · Destroyed > En route to the local spray area a total loss of power occurred along with a loss of oil pressure. The acft was aprx 200 ft AGL over a pear orchard. The plt was attempting to autorotate onto a nearby road but the left skid caught the roof top of a metal shed.… - [NTSB NYC86FGM02](https://openairdocs.org/ntsb/NYC86FGM02.md): Continental Copters OH13H Tomcat Mark 5A · Indiana, PA · Accident · Minor injuries · Final report · May 10, 1986 · N41830 · Substantial damage > The acft collided with wires during a spray run and crashed out of control. The plt tried to fly under the wires that were sighted too late to clear. During his survey of the field the plt had failed to see the wires that were struck. The collision broke off… - [NTSB LAX86LA211](https://openairdocs.org/ntsb/LAX86LA211.md): Bell 47G-5A · Agana · Accident · 1 fatal · Limited investigation · Final report · May 6, 1986 · N2996W · Destroyed > The helicopter crashed into the ocean when the plt attempted to lift off from a tuna boat. Reportedly, only three of the four tiedown ropes, which had secured the helicopter to the boat, had been released. The plt's medical certificate was dated 1/18/84. - [NTSB SEA86LA089](https://openairdocs.org/ntsb/SEA86LA089.md): Hiller 12E · Walla Walla, WA · Accident · No injuries · Limited investigation · Final report · Mar 30, 1986 · N87595 · Destroyed > A catastrophic failure of the planetary gear of the transmission occurred about 51 flight hours after overhaul. During forced landing a hard landing occurred severing the tail boom. A fire then erupted. - [NTSB LAX86FVD07](https://openairdocs.org/ntsb/LAX86FVD07.md): Bell 47G-2 · Stockton, CA · Accident · No injuries · Final report · Mar 6, 1986 · N6727D · Destroyed > The pilot was making a slow pass and dragged one spray boom on the ground. Insufficient airspeed resulted in loss of control. Helicopter crashed. - [NTSB LAX86LA231](https://openairdocs.org/ntsb/LAX86LA231.md): Bell 47G-5 · Castaic, CA · Accident · Serious injuries · Limited investigation · Final report · Feb 27, 1986 · N7802S · Substantial damage > The helicopter collided with unmarked wires while heading into sun during spraying operation. Plt does not recall seeing or hitting wires. - [NTSB CHI86FA017](https://openairdocs.org/ntsb/CHI86FA017.md): Bell 47G-5 · Plainfield, WI · Accident · 1 fatal · Field investigation · Final report · Oct 27, 1985 · N7840S · Destroyed > The acft crashed into trees and nosed into the wooded terrain after a loss of powr. The helicopter had been refueled the day before the acc. Normal fuel load was 20 gals. The plt had sprayed 20 acres & flown 9 miles to another field to spray but aborted due… - [NTSB LAX86FUM01](https://openairdocs.org/ntsb/LAX86FUM01.md): Bell 47 G-5 · Yuma, AZ · Accident · Minor injuries · Final report · Oct 22, 1985 · N7907S · Destroyed > The pilot was hovering after a night takeoff and collided with an electrical power line. - [NTSB LAX86LUG01](https://openairdocs.org/ntsb/LAX86LUG01.md): Texas Helicopter M74A · Daggett, CA · Accident · No injuries · Final report · Oct 19, 1985 · N51862 · Substantial damage > The plt stated he had just lifted off for a fertilizer spreading operation with an external load bucket, when the eng had a partial pwr loss at 100 ft AGL. A descent was started and the bucket was disengaged. However, while the plt was attempting to land the… - [NTSB CHI85FEV04](https://openairdocs.org/ntsb/CHI85FEV04.md): Hiller UH-12D · Breese, IL · Accident · No injuries · Final report · Sep 24, 1985 · N67182 · Substantial damage > The plt reported that the eng began losing power while he was en route at an alt of aprx 200 ft AGL. He turned & initiated an autorotation to a road construction site. The helicopter landed tail low. Subsequently, the tail boom was chopped off & the… - [NTSB LAX85LA344](https://openairdocs.org/ntsb/LAX85LA344.md): Bell 47G-2 · Big Bear City, CA · Accident · Minor injuries · Limited investigation · Final report · Aug 12, 1985 · N2899B · Substantial damage > On August 12, 1985, a Bell 47G2 helicopter collided with a yucca tree and rolled over during a landing near Big Bear City, CA. The acft sustained substantial damage and the plt and his two passengers were not injured. The purpose of the flight was a aerial… - [NTSB CHI85LA338](https://openairdocs.org/ntsb/CHI85LA338.md): Bell 47G-5 · Pickett, WI · Accident · No injuries · Limited investigation · Final report · Aug 7, 1985 · N1476W · Substantial damage > The fld where this accident occurred had been sprayed one week prior to the accident by a fixed-wing acft at an alt of 20 ft. no wires were noted to be a hazard at that time. On the day of the accident the plt of the helicopter was talking to a spotter on the… - [NTSB MIA85LA223](https://openairdocs.org/ntsb/MIA85LA223.md): Bell 47G-2 · Ochopee, FL · Accident · No injuries · Limited investigation · Final report · Aug 1, 1985 · N88AR · Substantial damage > The plt stated that he dropped his passenger off at a water station in the everglades, water taxied away from the station, accellerated up to 3100 RPM & just before he added collective pitch the transmission ass'y departed the helicopter, it rolled to the… - [NTSB CHI85FA301](https://openairdocs.org/ntsb/CHI85FA301.md): Bell 47G2A1 · Brook, IN · Accident · 1 fatal · Field investigation · Final report · Jul 20, 1985 · N1345A · Destroyed > The helicopter contacted the terrain in a flat attitude and rolled over during an autorotative landing. A witness stated an autorotation was entered at 800 ft AGL during which the plt made a 360 deg descending turn. An application of pwr was heard at an alt… - [NTSB CHI85FEX04](https://openairdocs.org/ntsb/CHI85FEX04.md): Texas Helicopter OH13E/M74 · Veedersburg, IN · Accident · Serious injuries · Final report · Jul 17, 1985 · N10000 · Destroyed > The acft was destroyed during a hard forced landing in a soybean fld following a loss of pwr. Inspection of the helicopter revealed the carburetor, fuel filter and fuel tank were void of fuel. The plt received received serious injuries during the accident and… - [NTSB FTW85LA288](https://openairdocs.org/ntsb/FTW85LA288.md): Bell 47G-5 · Crane, TX · Accident · No injuries · Limited investigation · Final report · Jul 16, 1985 · N8197J · Destroyed > The helicopter was being operated from a flat bed trailer. The plt stated he had lifted to a 3 foot hover when the eng stopped. The helicopter suddenly rotated about 45 degs before he could stop it. The plt attempted to make an autorotation touchdown but was… - [NTSB MIA85LA207](https://openairdocs.org/ntsb/MIA85LA207.md): Quinn EL Tomcat MK-5A · Blakley, GA · Accident · No injuries · Limited investigation · Final report · Jul 4, 1985 · N8429 · Substantial damage > While en route to reposition the helicopter to another farm, the eng lost power. The plt reported that during an autorotation, the main rotor lost some RPM as he stretched his glide to avoid a fence. As the helicopter touched down on uneven terrain, the main… - [NTSB SEA85LA155](https://openairdocs.org/ntsb/SEA85LA155.md): Bell 47G2 · Roosevelt, WA · Accident · No injuries · Limited investigation · Final report · Jul 2, 1985 · N11VH · Substantial damage > A total loss of power occurred while on a CFR 137 flight, due to fuel exhaustion. Although the fuel gauge showed 1/2 tank of fuel, the pilot failed to visually check the fuel prior to this flight. During autorotation onto a wheat field a hard landing occurred… - [NTSB NYC85LA081](https://openairdocs.org/ntsb/NYC85LA081.md): Bell 47G-3 · Plainsboro, NJ · Accident · No injuries · Limited investigation · Final report · Jun 15, 1985 · N49882 · Substantial damage > The helicpopter crashed shortly after takeoff with 55 gallons of fertilizer on board. The plt stated that each time he made a swath run over the field the blades of the helicopter were picking up some of the liquid fertilizer. On takeoff helicopter felt… - [NTSB SEA85LA126](https://openairdocs.org/ntsb/SEA85LA126.md): Hiller UH-12E · Athena, OR · Accident · No injuries · Limited investigation · Final report · May 31, 1985 · N37HS · Destroyed > The acft settled back to the ground shortly after takeoff before achieving translatioanal lift. The plt was attempting to test a new spray unit that had been installed. He had put 80 gallons of water in the spray tanks. - [NTSB CHI85FA198](https://openairdocs.org/ntsb/CHI85FA198.md): Bell 47G-2 · Burlington, MI · Accident · 1 fatal · Field investigation · Final report · May 16, 1985 · N3755J · Substantial damage > The helicopter was departing from a trailer which was sloped 5 degs to the left. During takeoff, the left skid lifted off first and the helicopter drifted to the right. The right skid caught on the trailer guides and the helicopter rolled over to the right. - [NTSB FTW85LA135](https://openairdocs.org/ntsb/FTW85LA135.md): Hiller UH-12D · Big Spring, TX · Accident · No injuries · Limited investigation · Final report · Mar 2, 1985 · N26EW · Substantial damage > CFI was demonstrating a simulated eng failure with tailwind of 10 KTS, 20 KTS grnd speed. The acft yawed left and touchdown was made with 10 kt grnd speed. The right skid broke off and the acft rolled over. The maneuver was initiated at 4 ft skid height. - [NTSB MIA85FA016](https://openairdocs.org/ntsb/MIA85FA016.md): Bell 47G-5A · Belle Glade, FL · Accident · No injuries · Field investigation · Final report · Oct 22, 1984 · N59424 · Substantial damage > Acft wad parked with 3 ft clearance between main rotor and corner of hangar. Plt stated that on lift off a gust of wind blew acft toward hangar. Main rotor blades made contact. Ground crewman injured by flying debris. - [NTSB LAX84LA501](https://openairdocs.org/ntsb/LAX84LA501.md): Bell 47G-2 · Borrego Springs, CA · Accident · Minor injuries · Limited investigation · Final report · Sep 29, 1984 · N28895 · Substantial damage > After landing, the plt hover taxied to the fuel pumps to refuel. While maneuvering to touch down at the pumps, the main rotor blade struck a 10 to 12 ft high vent pipe. The plt reported that the vent pipes were painted black & were not readily apparent with… - [NTSB ATL84LA295](https://openairdocs.org/ntsb/ATL84LA295.md): Bell 47G-5 · Bluefield, WV · Accident · Minor injuries · Limited investigation · Final report · Sep 24, 1984 · N1398X · Substantial damage > The pilot stated that he hovered the helicopter, made a right pedal turn and initiated a hover taxi across a rocky ravine adjacent to the pad. When over the ravine the helicopter settled onto to boulders beneath it. The pilot also stated that he thought he… - [NTSB LAX84LA464](https://openairdocs.org/ntsb/LAX84LA464.md): Bell 47G-5 · Watsonville, CA · Accident · No injuries · Limited investigation · Final report · Aug 29, 1984 · N4096G · Substantial damage > The plt maneuvered during an aerial application flt to avoid high tension wires and collided with lower telephone lines. The plt said the winds were gusty at the time of the accident. - [NTSB LAX84LA462](https://openairdocs.org/ntsb/LAX84LA462.md): Bell 47G-2 · El Cajon, CA · Accident · No injuries · Limited investigation · Final report · Aug 29, 1984 · N18807 · Substantial damage > The helicopter made a hard landing during a test flt. The plt reported that the collective was very stiff and he was notable to stop the descent during landing. FAA inspected the helicopter after the accident and found no discrepancies in the control system… - [NTSB LAX84LA424](https://openairdocs.org/ntsb/LAX84LA424.md): Bell 47G-5A · Winterhaven, CA · Accident · No injuries · Limited investigation · Final report · Aug 1, 1984 · N4099G · Substantial damage > The acft collided with the ground during a takeoff attempt. According to the plt, after the acft was loaded with 60 gallons of pesticide a takeoff was begun. The acft became airborne and traveled about 300 ft when the plt inadvertantly allowed the rotor RPM… - [NTSB CHI84LA317](https://openairdocs.org/ntsb/CHI84LA317.md): Bell 47-G2 · Jeffersonville, OH · Accident · No injuries · Limited investigation · Final report · Jul 29, 1984 · N59H · Substantial damage > The acft started to settle with power during takeoff after the acft was loaded with chemicals. The plt said he had a choice of, going through a fence or over it and decided to go over it. Pulling collective bled off m/r and the acft stopped flying. The tail… - [NTSB CHI84LA263](https://openairdocs.org/ntsb/CHI84LA263.md): Hiller UH 12 D · Deerfield, WI · Accident · Minor injuries · Limited investigation · Final report · Jun 26, 1984 · N62362 · Substantial damage > Plt was aware of pwr lines which crossed the field over which he was performing a calibration test. Plt stated that because of sun glare visual contact with the wires was lost. The acft contacted the wires. - [NTSB NYC84LA226](https://openairdocs.org/ntsb/NYC84LA226.md): Bell 47J · Cranbury, NJ · Accident · No injuries · Limited investigation · Final report · Jun 20, 1984 · N9398H · Substantial damage > The helicopter had made 4 successful spray passes during this series of runs after reloading. During the turn to start the fifth pass the acft started to settle and contacted the ground before recovery could be made. - [NTSB SEA84LA132](https://openairdocs.org/ntsb/SEA84LA132.md): Bell 47G2A · Buena, WA · Accident · No injuries · Limited investigation · Final report · Jun 14, 1984 · N11VH · Substantial damage > Main rotor blades contacted a wind machine during an aerial application flt. Helicopter settled into trees and rolled over. Plt said he knew the machine was there but had forgotten. - [NTSB LAX84LA341](https://openairdocs.org/ntsb/LAX84LA341.md): Bell 47G-5 · Oceanside, CA · Accident · Minor injuries · Limited investigation · Final report · Jun 9, 1984 · N2252W · Substantial damage > A security guard with no flight experience attempted to fly the helicopter which he was guarding during early morning hours after substantial alcoholic beverage consumption. The acft sustained substantial damage when it touched down on the rt skid aprx 15 ft… - [NTSB NYC84FGT02](https://openairdocs.org/ntsb/NYC84FGT02.md): Bell 47G-3 · Landisburg, PA · Accident · No injuries · Final report · Jun 4, 1984 · N49882 · Substantial damage > The helicopter lost eng power while turning on approach for landing, autorotated to a hard landing with main rotor contact to the tail boom. Two gals of fuel were drained from the acft fuel tank at the accident site. An eng run up was performed & found… - [NTSB ANC84LA097](https://openairdocs.org/ntsb/ANC84LA097.md): Piper PA-32-260 · Igiugig, AK · Accident · No injuries · Limited investigation · Final report · Jun 2, 1984 · N4732S · Substantial damage > During flt, the plt heard a 'loud bang' & then the eng lost power. He transmitted a mayday call & made an emergency landing on rolling tundra. During the landing, the nose & left main gear failed & the wing & prop were damaged. An exam revealed that the eng… - [NTSB SEA84LA066](https://openairdocs.org/ntsb/SEA84LA066.md): Hiller UH-12E · Forest Grove, OR · Accident · No injuries · Limited investigation · Final report · Mar 12, 1984 · N62377 · Substantial damage > The plt reported that while hovering, during an external load operation, the eng lost power & blue smoke & flames exited the back of the helicopter. The helicopter then struck trees before coming to rest. During an investigation, the eng started normally &… - [NTSB LAX83FA448](https://openairdocs.org/ntsb/LAX83FA448.md): Bell 47G · Oceanside, CA · Accident · No injuries · Field investigation · Final report · Sep 19, 1983 · N62221 · Substantial damage > Shortly after takeoff, the eng lost power at an alt of aprx 400 ft AGL. An autorotative landing was made on uneven terrain beside a stream with weeds aprx 3 ft high. During touchdown, the main rotor struck the tail boom. An inspection of the engine revealed… - [NTSB MIA83LA212](https://openairdocs.org/ntsb/MIA83LA212.md): Bell 47J · Labelle, FL · Accident · Minor injuries · Limited investigation · Final report · Aug 26, 1983 · N5824 · Substantial damage > While at an altitude of about 150 ft, the eng lost power. The plt initiated an autorotation, but during the landing, the main rotor struck trees & the helicopter was substantially damaged. The plt estimated there was 15 gal of fuel on board during the… Next page: https://openairdocs.org/ntsb.md?engine=41525&page=6 ## The whole list in SQL Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS: ```sql SELECT c."ntsbNumber", c."eventDate", c."eventType", c."eventCity", c."eventStateOrRegion", a.n_number, a."aircraftMake", a."aircraftModel", c."highestInjuryLevel", c."totalFatal", c."completionStatus", c.report_url FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c."mKey" AND a.position = 1 WHERE c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41525')) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb?engine=41525&page=5 --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.